/* ==========================================================================
   LectureBuddy - Minimal, Clean, Distraction-Free Styling
   Pure Vanilla CSS (Light & Dark Theme Support)
   ========================================================================== */

:root {
  /* Slate & Indigo Minimal Palette */
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --bg-accent-light: #eef2ff;

  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-focus: #6366f1;

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-secondary: #334155;

  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --primary-border: #c7d2fe;

  --success: #059669;
  --success-light: #ecfdf5;
  --warning: #d97706;
  --warning-light: #fffbeb;
  --danger: #e11d48;
  --danger-light: #fff1f2;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 22px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.06);

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark Mode Theme */
[data-theme="dark"] {
  --bg-main: #0b0f19;
  --bg-card: #111827;
  --bg-card-subtle: #1e293b;
  --bg-accent-light: rgba(99, 102, 241, 0.12);

  --border-light: #1e293b;
  --border-medium: #334155;
  --border-focus: #818cf8;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-secondary: #cbd5e1;

  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-light: rgba(99, 102, 241, 0.15);
  --primary-border: rgba(99, 102, 241, 0.3);

  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.15);
  --danger: #f43f5e;
  --danger-light: rgba(244, 63, 94, 0.15);

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.35);
}

/* Resets */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.25s ease, color 0.25s ease;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 1.5rem;
  width: 100%;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(var(--bg-main), 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  padding: 0.85rem 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--text-main);
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
  color: #fff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  box-shadow: 0 3px 8px rgba(79, 70, 229, 0.3);
}

.brand-title {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-title span {
  color: var(--primary);
}

.brand-tag {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-light);
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-full);
  margin-left: 0.4rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
  box-shadow: 0 2px 4px rgba(79, 70, 229, 0.2);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-main);
  border-color: var(--border-light);
}

.btn-secondary:hover {
  background-color: var(--bg-card-subtle);
  border-color: var(--border-medium);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--bg-card-subtle);
  color: var(--text-main);
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-md);
}

.btn-sm {
  font-size: 0.8rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 2.25rem 0 1.25rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.85rem;
}

.hero-title {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-main);
  line-height: 1.2;
  margin-bottom: 0.65rem;
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 620px;
  margin: 0 auto;
}

/* Sample Lecture Pills */
.sample-bar {
  margin-top: 1.35rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.sample-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.sample-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.sample-pill {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.sample-pill:hover {
  background: var(--primary-light);
  border-color: var(--primary-border);
  color: var(--primary);
  transform: translateY(-1px);
}

/* Upload Card & Dropzone */
.upload-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  margin-top: 1.5rem;
}

.dropzone {
  border: 2px dashed var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 2.5rem 1.5rem;
  text-align: center;
  background: var(--bg-main);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.dropzone-icon {
  width: 52px;
  height: 52px;
  background: var(--bg-card);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--primary);
  margin: 0 auto 0.85rem;
  box-shadow: var(--shadow-sm);
}

.dropzone-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.35rem;
}

.dropzone-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.file-types-badge {
  display: flex;
  justify-content: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.type-pill {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 0.2rem 0.55rem;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

/* File Selected Banner */
.file-preview {
  display: none;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.2rem;
  margin-top: 1.25rem;
}

.file-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  overflow: hidden;
}

.file-icon {
  font-size: 1.6rem;
}

.file-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file-detail {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* OCR Progress */
.ocr-progress-box {
  display: none;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  margin-top: 1.25rem;
}

.ocr-status {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.progress-track {
  width: 100%;
  height: 8px;
  background: var(--border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #4f46e5, #7c3aed);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

/* Action Controls Bar */
.action-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-light);
}

.select-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.select-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.select-input {
  font-family: inherit;
  font-size: 0.85rem;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background: var(--bg-card);
  color: var(--text-main);
  outline: none;
  cursor: pointer;
}

.select-input:focus {
  border-color: var(--primary);
}

/* ==========================================================================
   RESULTS WORKSPACE
   ========================================================================== */
.results-workspace {
  display: none;
  margin-top: 2rem;
  animation: fadeIn 0.35s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.results-header-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.meta-badges {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}

.badge-topic {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-full);
}

.badge-model {
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-light);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

.results-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.results-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-light);
}

.toolbar-buttons {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

/* Audio Player */
.audio-bar {
  display: none;
  align-items: center;
  gap: 0.6rem;
  background: var(--primary-light);
  border: 1px solid var(--primary-border);
  border-radius: var(--radius-full);
  padding: 0.3rem 0.8rem;
}

.audio-bar.active {
  display: inline-flex;
}

.audio-btn {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.75rem;
}

.audio-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
}

/* Tab Navigation */
.tabs-nav {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-light);
  scrollbar-width: none;
}

.tabs-nav::-webkit-scrollbar {
  display: none;
}

.tab-btn {
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-main);
  background: var(--bg-card-subtle);
}

.tab-btn.active {
  color: var(--primary);
  background: var(--primary-light);
}

.tab-count {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.1rem 0.45rem;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-light);
}

.tab-btn.active .tab-count {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Tab Panels */
.tab-panel {
  display: none;
  animation: fadeIn 0.2s ease;
}

.tab-panel.active {
  display: block;
}

.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

/* The Big Picture Callout */
.big-picture-card {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.08) 0%, rgba(124, 58, 237, 0.04) 100%);
  border: 1px solid var(--primary-border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius-lg);
  padding: 1.35rem 1.6rem;
  margin-bottom: 1.5rem;
}

.big-picture-label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.big-picture-body {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.5;
}

/* Simple Summary Paragraphs */
.summary-content {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.summary-content p {
  margin-bottom: 1rem;
}

.summary-content p:last-child {
  margin-bottom: 0;
}

.why-matters-card {
  background: var(--success-light);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
}

.why-matters-header {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--success);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.why-matters-text {
  font-size: 0.95rem;
  color: var(--text-main);
}

/* Key Points List */
.points-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.point-card {
  display: flex;
  gap: 1.15rem;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.point-card:hover {
  border-color: var(--primary-border);
  transform: translateX(2px);
}

.point-num {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 800;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.point-headline {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.3rem;
}

.point-description {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Terms & Flashcards */
.terms-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.view-toggle {
  display: flex;
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 0.2rem;
}

.view-btn {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  background: transparent;
  border: none;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.view-btn.active {
  background: var(--bg-card);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.terms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.term-box {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.term-pill {
  font-size: 0.7rem;
  font-weight: 700;
  color: #7c3aed;
  background: rgba(124, 58, 237, 0.1);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  align-self: flex-start;
  margin-bottom: 0.6rem;
}

.term-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.45rem;
}

.term-def {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.85rem;
  flex: 1;
}

.term-analogy {
  font-size: 0.82rem;
  color: var(--text-muted);
  background: var(--bg-card-subtle);
  border-radius: var(--radius-md);
  padding: 0.6rem 0.8rem;
  font-style: italic;
  display: flex;
  align-items: flex-start;
  gap: 0.35rem;
}

/* 3D Flip Flashcards */
.flashcards-wrapper {
  display: none;
  max-width: 540px;
  margin: 0 auto;
  text-align: center;
}

.flip-card {
  perspective: 1000px;
  height: 270px;
  cursor: pointer;
  margin-bottom: 1.25rem;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
  transform: rotateY(180deg);
}

.flip-front, .flip-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-lg);
  padding: 2.25rem 1.75rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background: var(--bg-card);
}

.flip-back {
  transform: rotateY(180deg);
  background: var(--bg-card-subtle);
  border-color: var(--primary-border);
}

.flip-hint {
  position: absolute;
  bottom: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.card-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

/* Practice Quiz */
.quiz-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.quiz-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.quiz-header {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 0.15rem 0.55rem;
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: 0.75rem;
}

.quiz-q {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 1rem;
  line-height: 1.5;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.quiz-opt-btn {
  font-family: inherit;
  font-size: 0.9rem;
  color: var(--text-main);
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.quiz-opt-btn:hover:not(.locked) {
  border-color: var(--primary);
  background: var(--bg-card);
}

.opt-key {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  font-size: 0.75rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.quiz-opt-btn.correct {
  background: var(--success-light) !important;
  border-color: var(--success) !important;
  color: #065f46 !important;
}

.quiz-opt-btn.wrong {
  background: var(--danger-light) !important;
  border-color: var(--danger) !important;
  color: #9f1239 !important;
}

.quiz-feedback-box {
  margin-top: 0.85rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  display: none;
}

.quiz-feedback-box.show {
  display: block;
}

.quiz-feedback-box.good {
  background: var(--success-light);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #065f46;
}

.quiz-feedback-box.bad {
  background: var(--danger-light);
  border: 1px solid rgba(244, 63, 94, 0.3);
  color: #9f1239;
}

/* Chat Tab */
.chat-box {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.chat-msgs {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  max-height: 420px;
  overflow-y: auto;
  padding-right: 0.4rem;
}

.msg {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.msg-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.msg.buddy .msg-avatar {
  background: linear-gradient(135deg, #4f46e5, #7c3aed);
  color: #fff;
}

.msg.user .msg-avatar {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-medium);
  color: var(--text-secondary);
}

.msg-body {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 0.85rem 1.15rem;
  font-size: 0.92rem;
  line-height: 1.6;
  max-width: 85%;
}

.msg.user .msg-body {
  background: var(--primary-light);
  border-color: var(--primary-border);
  color: var(--text-main);
  margin-left: auto;
}

.chat-input-row {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.chat-txt {
  flex: 1;
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-medium);
  background: var(--bg-card);
  color: var(--text-main);
  outline: none;
}

.chat-txt:focus {
  border-color: var(--primary);
}

/* Raw Extracted Notes */
.raw-textarea {
  width: 100%;
  height: 340px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  background: var(--bg-card-subtle);
  color: var(--text-main);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1rem;
  resize: vertical;
  outline: none;
  margin-bottom: 0.75rem;
}

.raw-textarea:focus {
  border-color: var(--primary);
  background: var(--bg-card);
}

/* Modal for API Key Settings */
.modal-mask {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  z-index: 100;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-mask.open {
  display: flex;
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 1.85rem;
  max-width: 500px;
  width: 100%;
  box-shadow: var(--shadow-lg);
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 1.1rem;
}

.form-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-muted);
}

.input-txt {
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
  background: var(--bg-card);
  color: var(--text-main);
  outline: none;
}

.input-txt:focus {
  border-color: var(--primary);
}

.input-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

/* Toast Container */
.toast-wrap {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.toast-msg {
  background: var(--text-main);
  color: var(--bg-main);
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.45rem;
  animation: slideIn 0.25s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateX(16px); }
  to { opacity: 1; transform: translateX(0); }
}

/* Spinner */
.spin {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spinning 0.6s linear infinite;
  display: inline-block;
}

@keyframes spinning {
  to { transform: rotate(360deg); }
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-light);
  padding: 1.5rem 0;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}

@media print {
  .site-header, .upload-card, .results-toolbar, .tabs-nav, .site-footer, .sample-bar {
    display: none !important;
  }
  .results-workspace, .tab-panel {
    display: block !important;
  }
  body {
    background: #fff !important;
    color: #000 !important;
  }
  .panel-card {
    border: none !important;
    box-shadow: none !important;
  }
}